US11739737B2 - Shape memory alloy filament crimping element - Google Patents
Shape memory alloy filament crimping element Download PDFInfo
- Publication number
- US11739737B2 US11739737B2 US16/270,459 US201916270459A US11739737B2 US 11739737 B2 US11739737 B2 US 11739737B2 US 201916270459 A US201916270459 A US 201916270459A US 11739737 B2 US11739737 B2 US 11739737B2
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- filament
- crimp
- crimping element
- planar surface
- disposed
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/064—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by its use
- F03G7/0645—Clamping, fixing or crimping parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
- F03G7/0614—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using shape memory elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/01—Connections using shape memory materials, e.g. shape memory metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/188—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
Definitions
- the present invention relates generally to the field of crimping, and in one salient aspect to fine filament crimping of, e.g., shaped memory alloy (SMA) wire.
- SMA shaped memory alloy
- SMA shaped memory alloy
- SMA generally comprises a metal that is capable of “remembering” or substantially reassuming a previous geometry. For example, after it is deformed, it can either substantially regain its original geometry by itself during e.g., heating (i.e., the “one-way effect”) or, at higher ambient temperatures, simply during unloading (so-called “pseudo-elasticity”).
- shape memory alloys include nickel-titanium (“NiTi” or “Nitinol”) alloys and copper-zinc-aluminum alloys.
- SMAs often find particular utility in mechanical actuation systems, in that it can be used to replace more costly, heavy, and space-consuming solenoid, motor driven, or relay devices. See for example, U.S. Pat. No. 4,551,974 to Yaeger, et al. issued on Nov. 12, 1985 and entitled “Shape memory effect actuator and methods of assembling and operating therefore”; U.S. Pat. No. 4,806,815 to Honma issued on Feb. 21, 1989 and entitled “Linear motion actuator utilizing extended shape memory alloy member”; U.S. Pat. No. 5,312,152 to Woebkenberg, Jr., et al. issued on May 17, 1994 and entitled “Shape memory metal actuated separation device”; U.S. Pat. No.
- FIG. 1 A is a perspective view of an exemplary shape memory alloy interlock assembly prior to crimping, in accordance with the principles of the present disclosure.
- FIG. 1 B is a perspective view of the shape memory alloy interlock assembly of FIG. 1 A showing a shape memory alloy filament crimped therein, in accordance with the principles of the present disclosure.
- FIG. 1 C is a cross sectional view of the shape memory alloy interlock assembly of FIG. 1 A , in accordance with the principles of the present disclosure.
- FIG. 2 is a perspective view of another exemplary shape memory alloy interlock assembly prior to crimping, in accordance with the principles of the present disclosure.
- filament refers to any substantially elongate body, form, strand, or collection of the foregoing, including without limitation drawn, extruded or stranded wires or fibers, whether metallic or otherwise.
- shape memory alloy shall be understood to include, but not be limited to, any metal that is capable of “remembering” or substantially reassuming a previous geometry. For example, after it is deformed, it can either substantially regain its original geometry by itself during e.g., heating (i.e., the “one-way effect”) or, at higher ambient temperatures, simply during unloading (so-called “pseudo-elasticity”).
- shape memory alloys include nickel-titanium (“NiTi” or “Nitinol”) alloys and copper-zinc-aluminum alloys.
- Interlocking features 110 , 112 on the interlock assembly 100 consist of male portion 110 and female portion 112 .
- the male portion 110 embeds and interlocks into the female portion 112 during the bending and crimping process.
- male portion 110 deforms plastically and expands to fill the volume of the female portion 112 .
- the material is compressed in the Z-direction 130 , and expands in X- and Y-directions 140 against the walls of the female portion 112 Expansion is constrained by the walls of the female portion 112 .
- the volumetric difference between this also results in cold welding between the interlocking surfaces, which result in large friction forces that prevent the crimp 100 from opening.
- cold welding occurs when the two surfaces (of male 110 and female 112 portions) are forced together in the absence of heat with high force, so that the surface oxide films and asperities are broken, and adhesion occurs
- Remaining portions of the SMA filament assembly are described in co-owned U.S.
- the interlocking design serves to increase the reliability of the crimp, preventing the crimp from losing electrical and mechanical connection with an SMA wire 150 that is inserted therein.
- the prior crimp design as described in co-owned U.S. patent application Ser. No. 13/372,199 filed on Feb. 13, 2012 and entitled “Apparatus and Methods for Filament Crimping and Manufacturing”, now U.S. Pat. No. 8,939,180; which is a divisional of and claims priority to co-owned U.S. patent application Ser. No. 12/892,208 filed Jul. 1, 2010 of the same title, now U.S. Pat. No. 8,113,243; which is a divisional of and claims priority to co-owned U.S. patent application Ser. No.
- the interlocking features 110 , 112 can be implemented with various configurations.
- female portion 112 may have a “negative” angle (tapered) surfaces instead of vertical surfaces.
- the interlocking features may work as a “dovetail” design.
Abstract
Description
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US16/270,459 US11739737B2 (en) | 2018-02-07 | 2019-02-07 | Shape memory alloy filament crimping element |
Applications Claiming Priority (2)
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US201862627539P | 2018-02-07 | 2018-02-07 | |
US16/270,459 US11739737B2 (en) | 2018-02-07 | 2019-02-07 | Shape memory alloy filament crimping element |
Publications (2)
Publication Number | Publication Date |
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US20190242370A1 US20190242370A1 (en) | 2019-08-08 |
US11739737B2 true US11739737B2 (en) | 2023-08-29 |
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US16/270,459 Active 2040-06-06 US11739737B2 (en) | 2018-02-07 | 2019-02-07 | Shape memory alloy filament crimping element |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112072348B (en) * | 2020-09-10 | 2021-09-28 | 泰兴龙溢端子有限公司 | Cold pressing terminal |
US11783858B2 (en) | 2021-01-06 | 2023-10-10 | Seagate Technology Llc | Shape memory alloy based actuator latch |
GB2609939B (en) * | 2021-08-17 | 2023-12-20 | Cambridge Mechatronics Ltd | A shape memory alloy wire joint |
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2019
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US10594048B2 (en) * | 2018-01-12 | 2020-03-17 | Te Connectivity India Private Limited | Crimp for connecting wires |
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US20190242370A1 (en) | 2019-08-08 |
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